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The kidneys are vital organs responsible for filtering blood, maintaining fluid balance, regulating electrolytes, and removing metabolic waste products. One of the major waste products the kidneys filter is urea, which is produced during the breakdown of proteins.
When a person consumes an excessive amount of protein, the kidneys are forced to work harder to eliminate the increased nitrogenous waste. Over time, this extra workload can put stress on the nephrons (the kidney’s functional units). If this continues for a long period, it can contribute to kidney damage or even chronic kidney disease (CKD).
While the body requires protein for growth, repair, and energy, excessive intake—particularly from supplements, red meat, or protein-rich diets—can be harmful, especially in individuals with pre-existing kidney issues. Studies show that people with diabetes, hypertension, or reduced kidney function are more vulnerable to protein-induced kidney damage.
Vitamin A (Option A): Overdose of Vitamin A can cause liver damage and toxicity, not directly kidney disease.
Vitamin B (Option B): Being water-soluble, excess Vitamin B is usually excreted in urine, rarely causing kidney failure.
Vitamin C (Option C): Very high doses can lead to kidney stones, but not generally kidney disease itself.
Proteins (Option D): Correct – long-term overdose can strain kidneys and lead to kidney disease.
Consume proteins according to recommended dietary allowances (about 0.8–1.0 g per kg body weight for adults).
People with kidney problems should limit protein intake as per a doctor’s advice.
Adequate hydration is important to support kidney filtration.
In conclusion, while proteins are essential for health, overconsumption can overload the kidneys, potentially leading to kidney disease.
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